Image receiving apparatus and method thereof for determining an orientation of a screen of an electronic apparatus

A method for determining an orientation of a screen of an electronic apparatus and an image receiving apparatus are provided. The method for determining the screen orientation includes the following steps of: receiving a screen shared image transmitted by the electronic apparatus, the screen shared image is a color image; performing line sampling on pixels of the screen shared image; and determining whether the screen is in the landscape orientation or in the portrait orientation according to color values of the sampled pixels of the screen shared image. The present disclosure can determine the screen orientation according to color values of the sampled pixels with small amount of operation data and high accuracy.